Changes

Accidentally removed
 (commit: 9cf0011)

Move tracking number of patches
from mod list to sorting patches
 (commit: fde3fbc)

Put progress counts in their own object
Allows the same counts to be used with a different logger.  Also remove 
unused setter for NeedsUnsatisfiedRootCount
 (commit: f09622f)

Move exception handling out of FIleSHA
Callers should be aware of exceptions anyway
 (commit: ce43104)

Extract FileSHA
Interacts with the file system so difficult to test unfortunately
 (commit: 2dc9f91)

Fix unassigned variable
 (commit: 6f26939)

Make this extractable
 (commit: f3352db)

Extract GenerateModList
Unfortunately interacts with AssemblyLoader and the file system so not 
really testable
 (commit: e40426a)

Add MessageQueue
 (commit: 7a2e18d)

Add QueueLogger and supporting classes
Allows logging to a queue
 (commit: 7d0c587)

Don't keep track of non-root needs unsatisfied
Isn't used anywhere
 (commit: d1975db)

Add FatalErrorHandler
Allows us to display a message to the user and quit when an 
unrecoverable error occurs.
Can't really be tested unfortunately.
 (commit: 78d4635)

Add background task support
Allows a background task to be run and monitored, including if it exits 
due to an exception
 (commit: 172e2f3)

Begin creating Progress namespace
 (commit: 7f90887)

Finish creating Progress namespace
 (commit: b0f72c2)

Unnecessary directives
 (commit: 3dbfbb1)

Add needs test for and/or and capitalization
 (commit: 92ae91f)

Separate out progress counter
Make it so that all the values can be incremented but not otherwise 
messed with.
Allow a new progress tracker to be initialized that shares a counter 
with another but uses a different logger
 (commit: 6596b47)

Ensure Counter behaves like an int
 (commit: 9a05e1b)

More unnecessary using
 (commit: 9736800)

Add test for ! (not) in :NEEDS
 (commit: a1af725)

More unnecessary using directives
 (commit: 3a19ff8)

Extract application of patches to its own thread
Allows it to not be bound by logging which can be slow
 (commit: e9c341a)

Test and fix PatchProgress.ProgressFraction
Patches are now only counted after needs are checked, so this shouldn't 
consider needs unsatisfied nodes
 (commit: b0e02e0)

Tweak
 (commit: ba24af3)